Add tests for json_error and JsonableError.
Add tests for json_error and JsonableError.

TigorC/zulip,rht/zulip,kou/zulip,zacps/zulip,TigorC/zulip,synicalsyntax/zulip,punchagan/zulip,joyhchen/zulip,reyha/zulip,sharmaeklavya2/zulip,JPJPJPOPOP/zulip,zulip/zulip,amanharitsh123/zulip,paxapy/zulip,krtkmj/zulip,ahmadassaf/zulip,samatdav/zulip,ahmadassaf/zulip,ahmadassaf/zulip,sharmaeklavya2/zulip,niftynei/zulip,rht/zulip,jainayush975/zulip,sup95/zulip,Galexrt/zulip,verma-varsha/zulip,calvinleenyc/zulip,Juanvulcano/zulip,souravbadami/zulip,umkay/zulip,kou/zulip,vaidap/zulip,mohsenSy/zulip,vabs22/zulip,brockwhittaker/zulip,PhilSk/zulip,rishig/zulip,dattatreya303/zulip,peguin40/zulip,brainwane/zulip,brockwhittaker/zulip,paxapy/zulip,vaidap/zulip,amyliu345/zulip,tommyip/zulip,umkay/zulip,shubhamdhama/zulip,AZtheAsian/zulip,arpith/zulip,isht3/zulip,reyha/zulip,brainwane/zulip,susansls/zulip,tommyip/zulip,amanharitsh123/zulip,sharmaeklavya2/zulip,samatdav/zulip,vabs22/zulip,TigorC/zulip,blaze225/zulip,amyliu345/zulip,jrowan/zulip,jackrzhang/zulip,Juanvulcano/zulip,vaidap/zulip,souravbadami/zulip,synicalsyntax/zulip,aakash-cr7/zulip,j831/zulip,SmartPeople/zulip,punchagan/zulip,jrowan/zulip,vabs22/zulip,peguin40/zulip,rishig/zulip,hackerkid/zulip,rht/zulip,jackrzhang/zulip,verma-varsha/zulip,mahim97/zulip,verma-varsha/zulip,reyha/zulip,sup95/zulip,sonali0901/zulip,timabbott/zulip,mahim97/zulip,sonali0901/zulip,sonali0901/zulip,joyhchen/zulip,jackrzhang/zulip,tommyip/zulip,vaidap/zulip,KingxBanana/zulip,KingxBanana/zulip,dhcrzf/zulip,vikas-parashar/zulip,SmartPeople/zulip,niftynei/zulip,rht/zulip,christi3k/zulip,punchagan/zulip,synicalsyntax/zulip,brainwane/zulip,grave-w-grave/zulip,susansls/zulip,andersk/zulip,AZtheAsian/zulip,SmartPeople/zulip,dhcrzf/zulip,timabbott/zulip,Galexrt/zulip,SmartPeople/zulip,PhilSk/zulip,ryanbackman/zulip,tommyip/zulip,reyha/zulip,KingxBanana/zulip,zacps/zulip,arpith/zulip,christi3k/zulip,Jianchun1/zulip,synicalsyntax/zulip,timabbott/zulip,verma-varsha/zulip,brockwhittaker/zulip,punchagan/zulip,sonali0901/zulip,timabbott/zulip,dhcrzf/zulip,Juanvulcano/zulip,jainayush975/zulip,ryanbackman/zulip,mohsenSy/zulip,JPJPJPOPOP/zulip,Galexrt/zulip,Jianchun1/zulip,showell/zulip,grave-w-grave/zulip,dawran6/zulip,zulip/zulip,tommyip/zulip,Vallher/zulip,showell/zulip,j831/zulip,niftynei/zulip,brainwane/zulip,vikas-parashar/zulip,paxapy/zulip,calvinleenyc/zulip,rishig/zulip,vikas-parashar/zulip,dawran6/zulip,calvinleenyc/zulip,Vallher/zulip,sup95/zulip,reyha/zulip,grave-w-grave/zulip,AZtheAsian/zulip,KingxBanana/zulip,kou/zulip,calvinleenyc/zulip,PhilSk/zulip,TigorC/zulip,AZtheAsian/zulip,PhilSk/zulip,shubhamdhama/zulip,kou/zulip,arpith/zulip,krtkmj/zulip,brainwane/zulip,krtkmj/zulip,niftynei/zulip,jackrzhang/zulip,samatdav/zulip,Diptanshu8/zulip,isht3/zulip,calvinleenyc/zulip,kou/zulip,souravbadami/zulip,ryanbackman/zulip,samatdav/zulip,Vallher/zulip,eeshangarg/zulip,jackrzhang/zulip,christi3k/zulip,shubhamdhama/zulip,punchagan/zulip,dawran6/zulip,showell/zulip,jrowan/zulip,dhcrzf/zulip,rishig/zulip,arpith/zulip,grave-w-grave/zulip,aakash-cr7/zulip,jphilipsen05/zulip,amyliu345/zulip,blaze225/zulip,blaze225/zulip,christi3k/zulip,dawran6/zulip,timabbott/zulip,Vallher/zulip,Jianchun1/zulip,paxapy/zulip,peguin40/zulip,jrowan/zulip,arpith/zulip,hackerkid/zulip,ahmadassaf/zulip,kou/zulip,rht/zulip,hackerkid/zulip,brainwane/zulip,susansls/zulip,sonali0901/zulip,j831/zulip,andersk/zulip,isht3/zulip,sharmaeklavya2/zulip,aakash-cr7/zulip,jphilipsen05/zulip,souravbadami/zulip,vabs22/zulip,joyhchen/zulip,samatdav/zulip,jainayush975/zulip,timabbott/zulip,mohsenSy/zulip,zacps/zulip,showell/zulip,brockwhittaker/zulip,punchagan/zulip,umkay/zulip,Vallher/zulip,zulip/zulip,Vallher/zulip,krtkmj/zulip,verma-varsha/zulip,sup95/zulip,sharmaeklavya2/zulip,isht3/zulip,andersk/zulip,hackerkid/zulip,vikas-parashar/zulip,zulip/zulip,mahim97/zulip,vabs22/zulip,amanharitsh123/zulip,mohsenSy/zulip,paxapy/zulip,umkay/zulip,shubhamdhama/zulip,ahmadassaf/zulip,vikas-parashar/zulip,Juanvulcano/zulip,susansls/zulip,AZtheAsian/zulip,shubhamdhama/zulip,hackerkid/zulip,jackrzhang/zulip,amyliu345/zulip,rht/zulip,aakash-cr7/zulip,jackrzhang/zulip,amyliu345/zulip,brainwane/zulip,JPJPJPOPOP/zulip,rishig/zulip,vaidap/zulip,amanharitsh123/zulip,aakash-cr7/zulip,mohsenSy/zulip,Jianchun1/zulip,j831/zulip,susansls/zulip,shubhamdhama/zulip,ahmadassaf/zulip,j831/zulip,eeshangarg/zulip,vaidap/zulip,dattatreya303/zulip,sharmaeklavya2/zulip,cosmicAsymmetry/zulip,Vallher/zulip,SmartPeople/zulip,SmartPeople/zulip,susansls/zulip,isht3/zulip,dattatreya303/zulip,Galexrt/zulip,JPJPJPOPOP/zulip,cosmicAsymmetry/zulip,eeshangarg/zulip,niftynei/zulip,umkay/zulip,krtkmj/zulip,peguin40/zulip,ryanbackman/zulip,zulip/zulip,Galexrt/zulip,dattatreya303/zulip,reyha/zulip,synicalsyntax/zulip,Jianchun1/zulip,Galexrt/zulip,PhilSk/zulip,andersk/zulip,Diptanshu8/zulip,TigorC/zulip,dhcrzf/zulip,punchagan/zulip,dhcrzf/zulip,arpith/zulip,cosmicAsymmetry/zulip,Diptanshu8/zulip,christi3k/zulip,amyliu345/zulip,JPJPJPOPOP/zulip,KingxBanana/zulip,brockwhittaker/zulip,kou/zulip,vabs22/zulip,grave-w-grave/zulip,verma-varsha/zulip,sup95/zulip,synicalsyntax/zulip,andersk/zulip,eeshangarg/zulip,rishig/zulip,hackerkid/zulip,grave-w-grave/zulip,niftynei/zulip,zacps/zulip,mahim97/zulip,Diptanshu8/zulip,vikas-parashar/zulip,Juanvulcano/zulip,Galexrt/zulip,sup95/zulip,umkay/zulip,rishig/zulip,jphilipsen05/zulip,zulip/zulip,cosmicAsymmetry/zulip,Diptanshu8/zulip,eeshangarg/zulip,jphilipsen05/zulip,Juanvulcano/zulip,rht/zulip,zacps/zulip,mohsenSy/zulip,isht3/zulip,blaze225/zulip,cosmicAsymmetry/zulip,peguin40/zulip,souravbadami/zulip,hackerkid/zulip,timabbott/zulip,showell/zulip,TigorC/zulip,umkay/zulip,krtkmj/zulip,joyhchen/zulip,dawran6/zulip,Diptanshu8/zulip,jainayush975/zulip,dattatreya303/zulip,jainayush975/zulip,ryanbackman/zulip,amanharitsh123/zulip,showell/zulip,eeshangarg/zulip,dattatreya303/zulip,blaze225/zulip,dawran6/zulip,dhcrzf/zulip,PhilSk/zulip,joyhchen/zulip,blaze225/zulip,ahmadassaf/zulip,andersk/zulip,zulip/zulip,j831/zulip,cosmicAsymmetry/zulip,Jianchun1/zulip,showell/zulip,christi3k/zulip,mahim97/zulip,paxapy/zulip,jrowan/zulip,JPJPJPOPOP/zulip,samatdav/zulip,calvinleenyc/zulip,AZtheAsian/zulip,jrowan/zulip,brockwhittaker/zulip,synicalsyntax/zulip,joyhchen/zulip,mahim97/zulip,jphilipsen05/zulip,sonali0901/zulip,tommyip/zulip,krtkmj/zulip,jphilipsen05/zulip,tommyip/zulip,andersk/zulip,ryanbackman/zulip,shubhamdhama/zulip,souravbadami/zulip,zacps/zulip,KingxBanana/zulip,eeshangarg/zulip,amanharitsh123/zulip,aakash-cr7/zulip,jainayush975/zulip,peguin40/zulip